ZHANG Qiyun
,
LIU Shuqi
,
XU Yaping Peking University
,
Beijing
,
China professor
,
Department of Chemistry
,
Peking University
,
Beijing
,
100871
,
China
金属学报(英文版)
The features of Cu_6Sn_5 growing slowly at lower temperature and growing rapidly up over 350℃,and or Cu_3Sn growing at higher temperatures,bave been detailedly observed under SEM.The increase of Pb content seems to inhibit sequentially the growth of Cu_6Sn_5 in Pb-Sn alloy....
关键词:
Cu
,
null
,
null
,
null
,
null
ZHENG Chaogui BAO Chenglin QIAO Zhiyu YE Yupu Peking University
,
Beijing
,
China 1 University of Science and Technology Beijing
,
Beijing
,
China Associate Professor
,
Department of Chemistry
,
Peking University
,
Beijing 100871
,
China
金属学报(英文版)
Five fields corresponding to the primary crystallization of PrCl_3,Sr_3PrCl_9,α(SrCl_2, CaCl_2),α_1(CaCl_2,SrCl_2)and α_2(SrCl_2,CaCl_2)respectively,six univariant lines related to the secondary crystallization,one ternary eutectic(48.0 wt-% PrCl_3,23.5 wt-% SrCl_2; 590℃)and ternary peritectic point...
关键词:
PrCl_3
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null
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null
,
null
ZHANG Qiyun LIU Shuqi LAN Tie FU Yuchuan Peking University
,
Beijing
,
China ZHANG Qiyun
,
Professor
,
Department of Chemistry
,
Peking University
,
Beijing
,
China
金属学报(英文版)
A study on the interfacial activity behavior of flux during aluminium brazing has been made by using metallography,SEM and electron prob techniques.The results show that the activity, of a flux is caused by the wetting of base metal with the liquid heavy metal reduced from the flux,thus,some regions...
关键词:
aluminium brazing
,
null
,
null
YANG Qiqin LIU Guankun LIU Zejin Zhongshan University
,
Guangzhou
,
China YANG Qiqin
,
Associate Professor
,
Department of Chemistry
,
Zhongshan University
,
Guangzhou
,
China
金属学报(英文版)
The electrochemical alloying of Y-Cu system in molten NaCl-KCl-YCl_3 has been investi- gated.The free energy changes of the formation reactions of the intermetallic compounds,in- cluding YCu_6 ,YCu_4 YCu_2 ,Yfu(973—103 K),were determined by means of electrode potential-time curves of the working ele...
关键词:
Y-Cu system
,
null
,
null
FANG Zheng CHEN Xinmin(H.M.Chen) Central South University of Technology
,
Changsha
,
China FANG Zheng
,
Associate Professor
,
Department of Chemistry
,
Central South University of Technology
,
Changsha
,
China
金属学报(英文版)
By taking the effect of oxygen contents into account,a new set of formulae which represents the oxygen potentials of H_2O-H_2 and H_2O-H_2-inerts gas mixtures has been derived.Classi- cal representation is only a particular case of it.Some of the variables affecting equilibrium atmosphere when trace...
关键词:
gas equilibration method
,
null
,
null
,
null
HUANG Huimin CHEN Xinmin Central South University of Technology
,
Changsha
,
China HUANG Huimin Associate Professor
,
Department of Chemistry
,
Central South University of Technology
,
Changsha
,
China
金属学报(英文版)
The nature of the oxygen contained in β-W was investigated with DSC,X-ray analysis on quenched samples and Auger spectroscope.It was shown that the oxygen contained in nonpyrophoric β-W consists of the reversibly chemisorbed oxygen and the interstitial oxygen which could form an interstitial solid s...
关键词:
tungsten
,
null
,
null
,
null